1、Unit 2 Saving the Earth,Topic2 All these problems are very serious.,Section A,pollution,many trees,cut down,forests gone,wash the earth away,冲走,change into desert,转换成，变成,沙漠,e.g. A lot of rich land has changed into desert because people have cut down too many trees.,sandstorms,come into being,n. 沙尘暴,
2、The boy and girls are talking about . different types of sandstorms the reasons for sandstorms sandstorms in different cities,1b Listen to 1a and choose the best answer.,Focus on the main idea of the conversation when you listen for the first time.,Listen and answer the questions,1.Whats the weather
3、 like today ? Its bad. The wind is so strong . And the sand really hurts face. 2.What causes these sandstorms ? People have cut down too many trees. As a result, a lot of rich land has changed into desert. 3.Do we still need to do something to protect the environment ? Yes, we do. Although we have b
4、uilt “The Green Great Wall”, we still need to do something to protect the environment .,conj. 虽然，尽管，即使,n.沙,somebody, someone, something, somewhere anybody, anyone, anything, anywhere none, nobody, nothing, nowhere everybody, everyone, everything, everywhere,一般情况下用于肯定句,一般情况下用于否定句和疑问句,表否定含义,可用于各种句式,th
5、e indefinite pronoun and adverb,1.I have _ to tell you. A. important something B. something important,B,形容词修饰不定代词和不定副词时，要放在不定代词/不定副词之后,Do you know?,2.Everybody _ ready for the match. A. is B. are,A,不定代词作主语时，谓语动词要用单数。,1a Listen, look and say.,1c Read 1a and complete trees functions.,Trees can stop th
6、e wind from blowing the earth away. A lot of water can be saved by forests. They can also stop the water from washing the earth away.,Trees functions,K: wind; sand; anything M: sandstorms J: cut down; as a result; change into M: affect J: stopfrom; blow away K: can be saved J: wash away K: is harmfu
7、l to; although; do something,Act out the dialog in pairs,2 Complete the sentences with the correct forms of the given phrases in the box.,as a result, change into, do something, stopfrom, blowaway,1.People have cut down such a large number of trees that the land _desert. 2.There are fewer trees left
8、, so the wind always _ the earth _. 3.Air pollution has become a serious problem, so we must _ to reduce it. 4.we should try our best to _ people _ cutting down the trees. 5.In the future, human beings can protect the trees well. _, animals will live a happy life in the forest.,has changed into,blow
9、s,away,do something,stop,from,As a result,3 Do you know how sandstorms come into being? Number the pictures and talk about the sandstorm in groups.,( ),( ),( ),( ),( ),( ),4,1,5,3,6,2,wash the earth away,many trees,change into desert,forests gone,sandstorms come into being,cut down trees,4 A. Listen
10、 to the passage and circle the phrases you hear.,become weaker destroy the environment disappear rapidly on the earth enough bamboo to eat,4 B. Listen again and fill in the blanks.,1. Now some kinds of animals are becoming _ _ _. 2. Some animals are_ _ _dying out completely. 3. In the past, pandas l
11、ived a quiet life and had _ _food. 4. Humans have _ _ _ the importance of protecting animals. 5. We should _ _ _to protect them.,do our best,in danger of,plenty of,come to understand,fewer and fewer,Lily, would you like _ to drink? Cindy is very busy now. She needs _ to help her. Is there _ wrong wi
12、th your computer? Jim looked for his pencil-box _ , but he didnt find it. I stayed at home last week. I didnt go _.,Use someone, something, anything, somewhere, anywhere to fill in the blanks.,something,someone,anything,somewhere,anywhere,Exercises,We learn: 1.Some words: sand, although 2.Some phras
13、es: change into, human being 3.Some sentences: (1)As a result, a lot of rich land has changed into desert. (2)Trees can stop the wind from blowing the earth away. We can: 1. Use the indefinite pronoun and adverb. 2.Talk about the sandstorm and its harm.,Summary,Assignment,Read 1a. Memorize the useful expressions and key sentences which we learn today. Finish Section A in your workbook. Preview Section B.,Thank you!,
